Motor-driven grease pump



Dec. 22, 1942. R. c. TRO YER MOTOR-DRIVEN GREASE PUMP s Shets-Sheet 1 'INVENTOR. 7A oYEH.

Filed June 12, 1941 Dec. 22, 1942. Q TROYE 2,306,094

MOTOR-DRIVEN GREASEIUMP I A k 3 Sheets-Sheet 2 Fild June 12, 1941 INVENTOR. C2 7790x573 c- 2 2- R. c. TROYER 2,306,094

MOTOR-DRIVEN GREASE PUMP Filed June 12, 1941 v 3 Sheets-Sheet 3 Patented Dec. 22, 1942 UNITED STATE".

MOTOR-DRIVEN GREASE PUMP Ralph C. Troyer, Newton, Kans.

Application June 12, 1941, Serial No. 397,766

1 Claim.

the locomotive are lubricated by the grease pump, a

' the R. P. 'M. of the motor whereby a substantial increase of power is gained at the point of impact to actuate the pump.

Another object of this invention is to provide a motor to be embodied with my grease pump patented May 20, 1941, bearing Number 2,242,687, in which this invention is not involved. However, to embody the motor, certain alterations in the aforesaid patent are required, the embodiment of which is an improvement upon the grounds hereinafter disclosed.

A still further object of this invention is to provide a casing subdivided and hereinafter referred to as an upper and lower portion of the casing, each portion to embody a function indispensable for a final result of the device as a whole. 7

These and other objects will hereinafter be more fully explained, reference being had to the accompanying drawings, forming a part of this specification, and in which like characters will apply to like parts in the different views.

Referring to the drawings:

Fig. 1 is a side View of the combined grease pump and motor casing.

Fig. 2 is an enlarged sectional View through the housing of the mechanism taken on line 22 in Fig. 5.

Fig. 3 is a view showing a modification for the motor.

Fig. 3A is a sectional view taken on line A-A in Fig. 5.

Fig. 4 is a plan view of the grease pump, the cap and motor being removed, and

Fig. 5 is a similar plan view showing the motor .portion'of the casing attached.

Fig. 6 is an enlarged but similar view to that of Fig. 5, the cap for the worm and gears being removed, also the cap for the motor, and other parts removed for convenience of illustration.

Fig, '7 is an enlarged sectional View through the distributor for compressed air to the cylinders.

Fig. 8 is a side elevation of the distributor as positioned on the crank shaft, the housing removed.

The subject matter of this invention relates more particularly to a motor as a power actuating medium to drive the mechanical moving devices of a grease pump that is arranged to receive sticks of grease and discharge the same under high compression through an appropriate conductor to lubricate the bearings of active moving elements, and more particularly for that of locomotives.

The device herein disclosed consists of a motor having a crank shaft 1 rotatably journalled in its respective upper portion 2 of the casing, the shaft ext-ending through cavities I and 2.', while the lower portion 3 contains therein spiral gears 4 and 5 as a pair, and being in duplicate as shown in Fig. 4, and journalled in working relation as a pump later described, said upper and lower casing portions being secured together by cap screws 2' spaced therearound.

The said crank shaft has a worm E secured thereto that is positioned between a pair of worm gears I and in mesh therewith, said worm gears being journalled with gears 5 and splined on their respective shafts 5' as turning means for said gears 5, last said gears being in mesh with their respective gears 4 as turning means therefor, all of said' gears being appropriately journalled in the said casing 2 and 3. Said gears 4 are out of meshto function as a feed for sticks of grease fed through a tubular member 8 that is secured to the lower casing member 3 extending oppositely therefrom and tangentially aligned with the points of the teeth of said gears t where said points are in close relation, and said gear teeth being the. conveyer of the grease inward and being ejected therefrom where the said gears 4 and 5 are in mesh with each other as the gears rotate, at which points A and A th grease is ejected into their respective ends of a duct 9,'and from thence outward through an appropriate conductor It as a connecting medium to the side rod bearings of a locomotive, or other bearingsfor lubrication. It will be seen that duct 9 extend across and beneath a dividing wall portion B intermedially positioned between said gears 4 and 5 as shown in Fig. 2, it being understood that said gears are individually housed but in communication as shown in Fig. 4, their peripheral engaged portions fitting greasetight, and likewise for the oppositely disposed sides of said gears.

It will now be seen that the grease thus conveyed and ejected is a means to force the same through an exit under high pressure, the purpose of which is to force lubricant into a zerk, or the like, as an oiling means for bearings, and furthermore it will be seen that high degree of pressure is easily accomplished by the aforesaid worm gear transmission.

One motive power to actuate the rotation of the worm is through the medium of a plurality of cylinders H bored in casing 2, each cylinder having a head l2 threadedly engaging to close the outer end of the bore. Each cylinder has a piston I3 and a rod 14 to connect the same to its respective crank I5, said cranks being in the form of a disc secured to the shaft eccentrically, the rods being connected by their respective bands l6, said bands and discs being secured by tongue and groove engagement as shown in Fig. 2, and the said bands having a removable portion thereof secured by bolts I1, whereby the rod is removable from the crank.

It will be understood that oppositely disposed rods near each end of the shaft are connected to their respective cranks that are slightly stag- 1 gered to avoid centering of the rods with the shaft simultaneously. This type of motor may be energized by steam or compressed air, the latter preferred, the conduction of which is from a compressor through a flexible pipe l8 that is connected to a nipple 19 that threadedly engages with a ductZU shown by dotted lines in Fig. 6, the duct being positioned in the upper casing portion 2 and communicating with the outer end of said crank shaft that is journalled in a closed bearing 2|, at which point said duct communicateswith a bore 22 axially entering at the end of the crank shaft and extending therealong and being in communication with a distributor comprised of a sleeve 23 secured to the shaft and rotatable therewith, the sleeve being journalled in a bore extending through upper portion 2 as at C, the ends of the sleeve extending outward from each side thereof as shown in Fig. 6.

The distributor as shown in Fig. 7 is arranged to rotate anticlockwise as indicated by the arrow, the hollow of the shaft having a pair of openings D oppositely disposed and communicating with openings E in the sleeve, last said openings having radially disposed portions 24, 25, 26, and 21 to function as cut-offs for the intakes and exhausts for the cylinders. sleeve has an annular groove 28 adjacent one end thereof to communicate continuously with an exhaust port 29, and the annular groove has apair of laterals 30 and 3| extending inward from the groove, and segmental in form, one of said laterals being shown in Fig. 8, while the other is oppositely disposed in the sleeve, both The distributor charging into cylinder chamber 33, while cylinder chamber 34 will exhaust through its respective duct 35 that is in communication with lateral 3!. By a further rotation, duct 36 will discharge into its cylinder chamber 31, at which instant cylinder chamber 38 will exhaust through its respective duct 39 into lateral 30, and so on as the shaft rotates. The varying widths of the laterals and disalignment of the intake openings with respect to the diametrical axis of the shaft is due to the staggered relation of the cranks to avoid centering of the rods with their respective cranks. To avoid a clockwise rotation of the sleeve, there is provided a series of ratchet teeth 40 surrounding the outer extending end of the sleeve and a spring tensioned pawl 4| secured to the casing in working relation to the teeth. If, for any reason, turning of the crank shaft aside from the motor drive be required, there is provided a knurled spindle 4| axial with and outwardly extending from the end of the crank shaft as turning means by gripping the same or the application of a tool to turn the shaft, there being a depression in the casing to position the spindle inward to avoid contact therewith while the grease pump is being operated.

There is also provided a fly wheel 42 secured to the crank shaft to maintain momentum of the shaft. As accessible means to the motor and worm gears there is provided cap plates 43 and 44 respectively, that are removably secured by cap screws 45 and 46, respectively, and the said plate 43 has an upward extension F centrally disposed therein to provide ample room for the fly Wheel, the said motor and worm gears being thus housed and carried by upper casing member 2 is means to partially pack with oil as lubricating means for the moving parts.

While I have given a detailed description of a cylindrical type motor, the same may be modified by the adoption of a turbine wheel 41 mounted on a shaft 48 that is journalled in the casing members, said turbine imparting power to a shaft 49 through the medium of bevel gears 50 and 5| as rotating means for the said worm B that is secured to the shaft 49. It will be understood that the turbine may be of a conventional type having a stationary band 52 peripherally positioned about the wheel, and in which the same rotates, the motive power being supplied by a compressor. The air is conducted through a flexible pipe 53 secured to the casing and communicating with a series of ducts 54 spaced around the wheel adjacent its periphery to slantingly contact the vanes 55 passing therethrough and outward through exhaust openings 56; furthermore the spiral gears shown and de-' scribed may be substituted with spear gears, and the eccentric discs of the crank shaft may be substituted by cranks of a conventional type to provide a longer stroke of the piston, and such other modifications may be made as lie within the scope of the appended claim. 1

Having fully described my invention what 1 claim as new and desire to secure by Letters Patent is:

In a grease gun consisting of a casing com prised of a lower portion and an upper portion, the lower portion having a grease conveying mechanism comprised of gears housed therein, said gears being joumalled in each upper and lower portions, and said lower portion having a grease supply for the gears and an outlet therefor, the upper portion having worm gears p0 sitioned therein and a worm to turn the gears as actuating means for the first named gears whereby the grease is fed into and from the lower casing portion, the upper portion having a pair of cavities spaced apart as accessible arranged from the outer side of said portion and a plate to cover the cavities, a shaft extending through each cavity and being journalled in the corresponding walls of each cavity, said shaft being bored axially from one end and terminating in the space between the cavities, a sleeve secured to the shaft and extending through the space between the cavities to function as a distributor for compressed air, a pair of discs in each cavity, said discs eccentrically secured to the shaft and each disc having a connecting arm mounted thereon and a piston and cylinder for each disc arm, each pair of said discs as mounted on the shaft to function as cranks for the shaft and being turned by their respective pistons alternately with respect to each pair, said upper portion of the casing having ducts formed therein to communicate with the source of compressed air and each cylinder as actuating means for the pistons, the current of air being controlled by the distributor for alternate movement of the said pairs of pistons.

RALPH C. TROYER. 

